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14. ____ Lubricate bearings on blower and exhauster shafts, belt conveyor shafts, door lift mechanism
and other bearings.
15. ____ Lubricate explosion relief door latches (if so equipped) and check for freedom of movement.
16. ____ Adjust door for good seal around edges of door; gasket needs to only touch sealing surface,
it does not need to be crushed. Inspect doors for damage and replace worn gasket if
necessary.
17. ____ Inspect and tighten set screws between bearings and shafts on blower and exhauster, belt
conveyor shafts, and other bearings on shafts.
18. ____ Inspect and replace, if necessary, V-belts on blowers, exhausters, combustion blowers, and
other fans.
19. ____ Inspect blowers, exhauster, combustion blowers, and other fans for residue build-up on fan
blades and housing. Clean as necessary. Tighten set screw holding fan to shaft.
APPLY POWER AND CHECK:
20. ____ Supply voltage agrees with furnace nameplate - measure between all three (3) phases and
record; ______/ ______/ ______.
21. ____ Amperage (with everything running) agrees with furnace nameplate - measure all incoming
lines and record; ______/______/______.
22. ____ Check that all blowers, exhausters, combustion blowers and other fans are rotating in the
correct direction.
23. ____ Check exhaust rate if it is critical for safe operation such as required for removing flammable
solvents or combustion venting. This test should be with all volume controls (dampers) at
minimum setting. Reference Safety Design Form for required exhaust rate.
ELECTRIC FURNACES
24. ____ Check that temperature controller does not cycle separate (back-up) contactors.
25. ____ Shut down furnace and make sure main contactors (or SCR power controller) and separate
contactors all open.
26. ____ Inspect heating elements for contamination, distortion and adequate support.
27. ____ Check electrical connection at heating element terminals for tightness.
FUEL GAS FURNACES
28. ____ Check pilot safety shutoff valves for leakage. (See Appendix D for details.)
29. ____ Check main safety shutoff valves for leakage. (See Appendix D for details.)
30. ____ Check that vent valve (if installed) is closed when main burner is firing.
31. ____ Turning up low gas pressure switch setting shuts all valves and resets purge timer. Return to
original setting. Low gas pressure switch set at ________.
32. ____ Turning down high gas pressure switch shuts all valves and resets purge timer. Return to
original. High setting gas pressure switch set at _______.
33. ____ Lubricate gas cocks.
34. ____ Locate remote emergency shut off valve, lubricate and operate to confirm free movement.
